2-Hydroxy arachidic acid methyl ester, a hydroxylated fatty acid methyl ester identified in sediment samples from the Harney River and in petroleum ether extracts of I. eriocarpa, serves as a volatile flavoring compound in anhydrous milk fat (AMF). Its presence is diminished upon treatment with lipases lipozyme-435 and TL-IM in a time-dependent fashion. [Matreya, LLC. Catalog No. 1710]